Can you be arrested for accidentally viewing child P****graphy?

i have the new ipod touch and i was searching the web for when the new law and order:SVU episodes were coming back and the damn thing is so freakin touch sensitive it clicked on something awful and it gave me the option to go back and i accidentally clicked on "let me see" (because i was freaking out and trying to get out as fast i could) then this police thing pops up and says somthing like "thank you for participating in our online investigation" and "big brother is watching you" i couldnt really tell cuz i exited out of it so fast, then i went and deleted my history;cookies;etc. and now im terrified that something bad is going to happen and cops are going to show up at my doorstep and everyone will think im a pervert (my parents as well) im 15 (and a girl, if that makes a difference) and really scared that this will hurt my future ( i want to be a nanny) and i find anything of that nature repulsive!!